Global Patent Index - EP 0541128 A1

EP 0541128 A1 19930512 - Color display device.

Title (en)

Color display device.

Title (de)

Farbiges Anzeigegerät.

Title (fr)

Dispositif d'affichage en couleurs.

Publication

EP 0541128 A1 19930512 (EN)

Application

EP 92119147 A 19921109

Priority

JP 29121391 A 19911107

Abstract (en)

A color display comprising a white light source, a first color polarizer (3A), an active matrix liquid crystal cell (1), a second color polarizer (3B), the second liquid crystal cell (2A), a third color polarizer (3C), and the third liquid crystal cell (2B), wherein the active matrix liquid crystal cell (1) functions as an image forming element, wherein the second and the first liquid crystal cells (2A, 2B) have a function as an optical switch to selectively transmit the three primary colors of light depending on a particular combination of on and off thereof, and wherein by driving the above two cells (2A, 2B) in synchronization with each other, images corresponding to the primary colors of light are displayed sequentially so as to realize a full color display. <IMAGE>

IPC 1-7

G02F 1/1335; G02F 1/1347; G02F 1/23

IPC 8 full level

G02F 1/1335 (2006.01); G02F 1/1333 (2006.01); G02F 1/1347 (2006.01); G02F 1/139 (2006.01); G02F 1/141 (2006.01)

CPC (source: EP KR)

G02F 1/133 (2013.01 - KR); G02F 1/13473 (2013.01 - EP); G02F 1/133533 (2013.01 - EP); G02F 1/1393 (2013.01 - EP); G02F 1/1396 (2013.01 - EP); G02F 1/141 (2013.01 - EP)

Citation (search report)

  • [YD] EP 0237163 A1 19870916 - FORD MOTOR CO [GB], et al
  • [YD] EP 0422687 A1 19910417 - TEKTRONIX INC [US]
  • [A] EP 0274391 A2 19880713 - HITACHI LTD [JP]
  • [A] EP 0451621 A2 19911016 - LIESEGANG FA ED [DE]
  • [A] PATENT ABSTRACTS OF JAPAN vol. 15, no. 335 (P-1242)26 August 1991 & JP-A-31 25 121 ( STANLEY ELECTRIC ) 28 May 1991
  • [A] IBM TECHNICAL DISCLOSURE BULLETIN vol. 22, no. 5, October 1979, ARMONK, USA pages 1769 - 1772 A.N. BRINSON ET AL. 'Liquid Crystal Apparatus for Converting Black and White CRT Display into Colored Display'

Designated contracting state (EPC)

CH DE FR GB LI

DOCDB simple family (publication)

EP 0541128 A1 19930512; CN 1073267 A 19930616; JP H05127189 A 19930525; KR 930010587 A 19930622

DOCDB simple family (application)

EP 92119147 A 19921109; CN 92113770 A 19921106; JP 29121391 A 19911107; KR 920020862 A 19921107